Community composition of Symbiodiniaceae among four scleractinian corals in the eastern Gulf of Thailand

Chankong, Anchalee; Kongjandtre, Narinratana; Senanan, Wansuk; Manthachitra, Vipoosit

doi:10.1016/j.rsma.2019.100918

Cited by 15 publications

(18 citation statements)

References 35 publications

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“…However, our study demonstrates that a greater diversity of subclades within Symbiodinium, Cladocopium and Durusdinium are hosted by corals from Singapore than previously reported. More broadly in Southeast Asia and in agreement with our work, Cladocopium C15 has recently been identified as the dominant endosymbiont associated with P. lutea in the Gulf of Thailand (Chankong et al 2019).…”

Section: Discussionsupporting

confidence: 91%

“…Porites lutea is an ecologically important and widespread coral species that contributes substantially to the formation and maintenance of coral reefs throughout the Indian and Pacific Oceans (Stat and Gates 2011;Tanzil et al 2013). The composition of Symbiodiniaceae communities hosted by this species is known from Japan, Persian Gulf, Red Sea, northern South China Sea, Gulf of Thailand and the Great Barrier Reef (LaJeunesse et al 2004a;Hume et al 2013;Gong et al 2018;Chankong et al 2019;Terraneo et al 2019). However, despite the high levels of biodiversity in Southeast Asian marine ecosystems, only limited work using denaturing gel gradient electrophoresis (DGGE)which is limited in its ability to detect symbiont types of low abundancehas been performed in Singapore (Tanzil et al 2016), and currently no data exist for corals from Peninsular Malaysia.…”

Section: Introductionmentioning

confidence: 99%

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Endosymbiont diversity and community structure in Porites lutea from Southeast Asia are driven by a suite of environmental variables

et al. 2020

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Many corals depend upon the highly specialised and intricate relationship they form with Symbiodiniaceae algal symbionts. Porites lutea is a massive reef-building coral found throughout Southeast Asia that hosts these endosymbionts obligately. Yet despite the prevalence and importance of P. lutea as one of the most dominant corals here, its associated Symbiodiniaceae communities have not been precisely characterised. In this study, we used high-throughput DNA amplicon sequencing of the nuclear internal transcribed spacer 2 (ITS2) to characterise the diversity, community structure and biogeographic distribution of Symbiodiniaceae in P. lutea throughout Singapore and Peninsular Malaysia. Consistent with previous studies, we found that Cladocopium was the most dominant genus among all samples, and Cladocopium C15 was the most dominant type (or subclade) with 100% occurrence in all samples from every study site. Results also revealed numerous Symbiodiniaceae types associated with P. lutea that were previously undetected in Southeast Asia. Endosymbiont diversity and community variation are driven by a combination of site-specific mean monthly cloud cover and variance in monthly sea surface temperature. This study contributes baseline data toward understanding differences in Symbiodiniaceae assemblages hosted by P. lutea, shedding light on how they might be indicative of particular environmental conditions and coral responses.Electronic supplementary material The online version of this article (https://doi.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Endosymbiont diversity and community structure in Porites lutea from Southeast Asia are driven by a suite of environmental variables

et al. 2020

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“…Nevertheless, their susceptibility seems to reduce as they were repeatedly exposed to thermal stress (Pratchett et al, 2013;McClanahan, 2017;Putchim et al, 2017). Association with Clade D types of zooxanthellae, a more heatresistant clade, which have been increasingly reported in Thai coastal reefs (Chankong et al, 2018(Chankong et al, , 2020, may contribute to their enhanced thermotolerance (Cunning et al, 2015;Wham et al, 2017). On the contrary, field records showed that P. lutea often suffered partial bleaching and mortality (Phongsuwan and Chansang, 2012;Brown et al, 2014) and that this phenomenon has gradually increased during the past decade (Putchim et al, 2017).…”

Section: Differences In Sensitivity To Warming Among Important Groups Of Tropical Marine Organisms and Species And Its Ecological Relevanmentioning

confidence: 99%

Experimental Assessment of Vulnerability to Warming in Tropical Shallow-Water Marine Organisms

et al. 2021

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Tropical shallow-water habitats represent the marine environments with the greatest biodiversity; however, these habitats are the most vulnerable to climate warming. Corals, seagrasses, and macroalgae play a crucial role in the structure, functions, and processes of the coastal ecosystems. Understanding their growth and physiological responses to elevated temperature and interspecific sensitivity is a necessary step to predict the fate of future coastal community. Six species representatives, including Pocillopora acuta, Porites lutea, Halophila ovalis, Thalassia hemprichii, Padina boryana, and Ulva intestinalis, collected from Phuket, Thailand, were subjected to stress manipulation for 5 days. Corals were tested at 27, 29.5, 32, and 34.5°C, while seagrasses and macroalgae were tested at 27, 32, 37, and 42°C. After the stress period, the species were allowed to recover for 5 days at 27°C for corals and 32°C for seagrasses and macroalgae. Non-destructive evaluation of photosynthetic parameters (Fv/Fm, Fv/F0, ϕPSII and rapid light curves) was carried out on days 0, 3, 5, 6, 8, and 10. Chlorophyll contents and growth rates were quantified at the end of stress, and recovery periods. An integrated biomarker response (IBR) approach was adopted to integrate the candidate responses (Fv/Fm, chlorophyll content, and growth rate) and quantify the overall temperature effects. Elevated temperatures were found to affect photosynthesis, chlorophyll content, and growth rates of all species. Lethal effects were detected at 34.5°C in corals, whereas adverse but recoverable effects were detected at 32°C. Seagrasses and macroalgae displayed a rapid decline in photosynthesis and lethal effects at 42°C. In some species, sublethal stress manifested as slower growth and lower chlorophyll content at 37°C, while photosynthesis remained unaffected. Among all, T. hemprichii displayed the highest thermotolerance. IBR provided evidence that elevated temperature affected the overall performance of all tested species, depending on temperature level. Our findings show a sensitivity that differs among important groups of tropical marine organisms inhabiting the same shallow-water environments and highlights the importance of integrating biomarkers across biological levels to assess their vulnerability to climate warming.

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“…(D1-6; unpublicized report from Yucharoen, 2020), while P. lutea is commonly dominated by C15 (Cladocopium sp. ; Chankong et al, 2018Chankong et al, , 2020Tan et al, 2020). However, there is no direct evidence to demonstrate that coral reactions to marine debris were affected by genus of zooxanthellae, while from the changed environmental factors, we hypothesized that types of Symbiodiniaceae might drive the corals to perform differently under marine debris stress.…”

Section: Opaque Plastic Bag and Transparent Plastic Bagmentioning

confidence: 92%

Physiological Responses of Pocillopora acuta and Porites lutea Under Plastic and Fishing Net Stress

et al. 2021

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Marine debris has become a global problem affecting coral health around the globe. However, the photophysiological responses of corals to marine debris stress remain unclear. Therefore, this study firstly investigated transparent and opaque plastic bag shading and fishing nets directly contacting the coral. Photosynthetic performance, pigment content, symbiont density, and calcification rate of a branching coral Pocillopora acuta and a massive coral Porites lutea were investigated after 4 weeks of exposure to marine debris. The results show that the maximum quantum yield of PSII significantly decreased in P. lutea with all treatments, while P. acuta showed no effect on the maximum quantum yield of PSII from any treatments. Transparent plastic bag shading does not affect P. acuta, but significantly affected the maximum photochemical efficiency of P. lutea. Photoacclimation of cellular pigment content was also observed under opaque plastic bag shading for both species at week 2. Fishing nets had the strongest effect and resulted in P. acuta bleaching and P. lutea partial mortality as well as a decline in zooxanthellae density. Calcification rate of P. acuta significantly decreased with treatments using opaque plastic bag and fishing net, but for P. lutea only the treatment with fishing net gave any observable effects. This study suggests that the sensitivities of corals to marine debris differ strongly by species and morphology of the coral.

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Community composition of Symbiodiniaceae among four scleractinian corals in the eastern Gulf of Thailand

Cited by 15 publications

References 35 publications

Endosymbiont diversity and community structure in Porites lutea from Southeast Asia are driven by a suite of environmental variables

Endosymbiont diversity and community structure in Porites lutea from Southeast Asia are driven by a suite of environmental variables

Experimental Assessment of Vulnerability to Warming in Tropical Shallow-Water Marine Organisms

Physiological Responses of Pocillopora acuta and Porites lutea Under Plastic and Fishing Net Stress

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